diff options
| -rw-r--r-- | drivers/media/platform/broadcom/bcm2835-unicam.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/media/platform/broadcom/bcm2835-unicam.c b/drivers/media/platform/broadcom/bcm2835-unicam.c index 550eb1b064f1..f10064107d54 100644 --- a/drivers/media/platform/broadcom/bcm2835-unicam.c +++ b/drivers/media/platform/broadcom/bcm2835-unicam.c @@ -640,7 +640,14 @@ static inline void unicam_reg_write_field(struct unicam_device *unicam, u32 offs static void unicam_wr_dma_addr(struct unicam_node *node, struct unicam_buffer *buf) { - dma_addr_t endaddr = buf->dma_addr + buf->size; + /* + * Due to a HW bug causing buffer overruns in circular buffer mode under + * certain (not yet fully known) conditions, the dummy buffer allocation + * is set to a a single page size, but the hardware gets programmed with + * a buffer size of 0. + */ + dma_addr_t endaddr = buf->dma_addr + + (buf != &node->dummy_buf ? buf->size : 0); if (node->id == UNICAM_IMAGE_NODE) { unicam_reg_write(node->dev, UNICAM_IBSA0, buf->dma_addr); |